The purpose of this observational study is to understand the changes in the types of respiratory patients hospitalized in China in recent years through a multicenter retrospective clinical study, and at the same time to understand the reasons for hospitalization and the distribution of different tumor types in oncology patients, so as to provide data support and theoretical basis for the future development of China's respiratory department.

The main questions it aims to answer are

1. the trend of change of respiratory diseases in China in the past 10 years.
2. the trend of change in the causes of hospitalization of respiratory tumor patients in China in the past 10 years.
3. the trend of the proportion of each tumor in the respiratory department in China over the past 10 years.

Inclusion Criteria:

Clinical diagnosis of Respiratory diseases Must be an inpatient

Exclusion Criteria:

Non-respiratory inpatients

A respiratory oncology epidemiology study based on real-world big data from respiratory medicine, with retrospective data collected from respiratory medicine inpatients at a multicenter for nearly 10 years.